Western Digital 2TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD22PURZ
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AI Verdict
This 2TB, 5400 RPM class, 256 MB cache 3.5-inch HDD is purpose-built for 24/7 surveillance systems requiring continuous write-intensive recording.
This drive is a strong fit if you're building or upgrading a surveillance system. Its 2TB capacity, 24/7 operation engineering, and AllFrame technology are specifically designed for the demands of continuous video recording. It's not a general-purpose drive, but for its niche, it hits the mark.
If you need more storage for a surveillance system, look for WD Purple drives with higher capacities (4TB and above) which also offer tarnish-resistant components for harsher environments.
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Pros
- Engineered for 24/7 operation in surveillance systems, handling constant video recording without issues.
- AllFrame technology minimizes frame loss, ensuring consistent video capture and playback quality.
- Supports a high workload rate of up to 180 TB/year, suitable for demanding surveillance applications.
- Operates with low noise (21/26 dBA idle/seek for the 2TB model) and low power consumption (3.8W read/write, 3.2W idle).
- Utilizes CMR (Conventional Magnetic Recording) technology, which is preferred for write-intensive workloads over SMR.
- Built with advanced error recovery and vibration tolerance to maintain data integrity in NVR environments.
Cons
- Sustained read/write speeds, around 175 MB/s, are slower than typical desktop drives, making it unsuitable for gaming or OS installation.
- Some users report confusion regarding TRIM support, which is typically associated with SMR drives, despite being a CMR drive.
- Not designed for general desktop use, where its specialized firmware for continuous writing can hinder performance for mixed workloads.
Dimension Scores
With sustained speeds around 175 MB/s, it's slower than typical desktop HDDs (often 200+ MB/s) but adequate for continuous, sequential surveillance recording.
Engineered for 24/7 operation, elevated heat, and vibration tolerance, with a 180 TB/year workload rate, it's built for high endurance in surveillance environments.
2TB is a common entry-level capacity for surveillance systems, offering enough space for moderate camera setups, though larger systems will need more.
The 3.5-inch form factor and SATA 6 Gb/s interface ensure broad compatibility with most desktop and NVR/DVR systems.
Best For
- Dedicated NVRs and DVRs requiring continuous 24/7 video recording from multiple cameras.
- Surveillance systems needing a drive optimized for write-intensive, low bit-rate, high stream-count applications.
- Users seeking a hard drive with enhanced durability and vibration tolerance for always-on security setups.
Not Recommended For
- Primary desktop storage or gaming PCs where faster read/write speeds and lower latency are critical.
- Users needing a cost-effective general-purpose storage drive, as cheaper alternatives like WD Blue exist for less demanding tasks.
- High-performance video editing workstations that require rapid data access and transfer speeds beyond 175 MB/s.
Watch Out For
- Don't expect this drive to perform like a desktop HDD for general tasks; its firmware is optimized for continuous writing, not quick file access or gaming.
- While rated for 180 TB/year workload, some users in Reddit discussions have reported throughput issues in their surveillance systems, suggesting potential bottlenecks elsewhere in the setup.
- The 5400 RPM class speed, while efficient for surveillance, means it won't feel snappy for tasks like loading large applications or frequently accessed files.
Full Specifications
| ASIN | B09N9XK7V4 |
| Brand | Western Digital |
| Color | Purple |
| Series | Purple HDD |
| Language | English, English, English, English, English |
| Hard Drive | 2 TB Mechanical Hard Disk |
| Item Weight | 15.8 ounces |
| Manufacturer | Western Digital Technologies, Inc. |
| Special Feature | Data Recovery Service |
| Flash Memory Size | 2 TB |
| Hardware Platform | PC |
| Installation Type | Internal Hard Drive |
| Item model number | WD22PURZ |
| Compatible Devices | Desktop |
| Product Dimensions | 5.79 x 4 x 1.03 inches |
| Hard Disk Interface | Serial ATA |
| Hard Drive Interface | Serial ATA |
| Hard Disk Description | Mechanical Hard Disk |
| Hard Disk Form Factor | 3.5 Inches |
| Item Dimensions LxWxH | 5.79 x 4 x 1.03 inches |
| Connectivity Technology | SATA |
| Digital Storage Capacity | 2 TB |
What Buyers Say
Users consistently highlight this drive's suitability for its intended purpose: 24/7 surveillance recording. Many praise its quiet operation and ease of installation in NVRs. While some users initially questioned its CMR status due to TRIM support, it's generally accepted as a reliable, purpose-built drive for continuous writing. The main complaint is its unsuitability for general desktop or gaming use due to its specialized firmware and lower speeds compared to performance-oriented drives.
“Needed a drive for my new camera system, this thing just sits there and records 24/7 without a peep, exactly what I needed, no complaints so far after a few months.”
Common Praise
- Works reliably for continuous 24/7 video recording in surveillance systems.
- Runs quietly, which is a plus for home or office NVR setups.
- Installation is straightforward with the standard SATA interface.
- Considered a durable option for environments with elevated temperatures and vibrations.
- Offers sufficient 2TB capacity for typical surveillance applications.
Common Complaints
- Not fast enough for gaming or use as a primary desktop drive; performance suffers in non-surveillance roles.
- Confusion around SMR vs. CMR due to the presence of TRIM support, despite being a CMR drive.
- Some users report lower-than-expected write speeds in specific benchmark tests (e.g., 37 MB/s in one instance), though others report higher.
- Can be seen as overpriced for general data storage when compared to cheaper, faster desktop alternatives.
Ownership Tips
- The drive maintains a consistent temperature even under constant recording, indicating good thermal management for its intended use.
- Its low power draw is noticeable, contributing to a cooler and more efficient NVR system.
- The drive's quiet operation is a real benefit, especially if your surveillance system is in a living area.
- While it has TRIM support, it doesn't seem to negatively impact its performance for sequential writes in surveillance applications.
Frequently Asked Questions
Can I use this WD Purple drive in my desktop PC for regular storage or gaming?
No, this drive is specifically engineered for surveillance systems and 24/7 write-intensive workloads. It's not optimized for the mixed read/write operations or speed demands of a desktop PC or gaming.
What does 'AllFrame technology' do?
AllFrame technology helps reduce frame loss and improve video playback quality in surveillance systems by optimizing the drive for write-intensive, low bit-rate, high stream-count workloads.
Is this a CMR or SMR drive?
The WD22PURZ is a CMR (Conventional Magnetic Recording) drive. While some users have noted TRIM support, which can cause confusion, Western Digital's datasheets confirm it uses CMR technology.
How many cameras can this 2TB drive support?
While the product description mentions support for up to 64 cameras for some Purple drives, the 1TB through 3TB models like this one support up to eight bays in a system. The actual number of cameras depends on resolution, frame rate, and compression.
What is the workload rate for this drive?
This drive supports a workload rate of up to 180 TB per year, which is the amount of user data transferred to or from the hard drive annually.
Buying Guide
When buying a hard drive for surveillance, you need something that can handle constant writing without failing. Unlike a desktop drive that's mostly idle, a surveillance drive is always on, always recording. You're looking for endurance and stability over raw speed for quick file access. This WD Purple drive is built for that specific grind, so don't expect it to be a speed demon for your games. It's a workhorse for video streams.
Workload Rate (180 TB/yr)
This tells you how much data the drive is designed to write and read annually. For surveillance, a high workload rate like 180 TB/yr means it can handle continuous recording from multiple cameras without wearing out prematurely, unlike a standard desktop drive.
AllFrame Technology
This is WD's special sauce for surveillance. It helps prevent video frame loss, which is crucial when you need every second of footage. Think of it like a dedicated traffic controller for your video streams, making sure everything gets recorded smoothly.
CMR (Conventional Magnetic Recording)
CMR drives are generally preferred for write-intensive applications like surveillance because they write data in a way that doesn't slow down as much over time compared to SMR (Shingled Magnetic Recording) drives, ensuring consistent recording performance.
Alternatives
If you need faster speeds for a desktop or gaming PC, look for 7200 RPM drives with larger caches, or consider an SSD for primary storage. For general, less demanding storage, a standard desktop HDD like a WD Blue might be more cost-effective.
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